- normal density curve
- 正规密度曲线
English-Chinese Dictionary of Agriculture (英汉农业大词典). 2013.
English-Chinese Dictionary of Agriculture (英汉农业大词典). 2013.
Normal distribution — This article is about the univariate normal distribution. For normally distributed vectors, see Multivariate normal distribution. Probability density function The red line is the standard normal distribution Cumulative distribution function … Wikipedia
normal distribution — Statistics. a theoretical frequency distribution represented by a normal curve. Also called Gaussian distribution. [1895 1900] * * * In statistics, a frequency distribution in the shape of the classic bell curve. It accurately represents most… … Universalium
Normal, Illinois — Uptown Normal looking east on North Street … Wikipedia
density function — In statistics, a function whose integral is calculated to find probabilities associated with a continuous random variable (see continuity, probability theory). Its graph is a curve above the horizontal axis that defines a total area, between… … Universalium
normal distribution — a symmetric, bell shaped probability distribution having the density function where x is the abscissa, f(x) is the ordinate, e is the base of natural logarithms (2.718), μ is the mean, and σ is the standard deviation. The normal… … Medical dictionary
normal distribution — The well known bell shaped curve. According to the Central Limit Theorem, the probability density function of a large number of independent, identically distributed random numbers will approach the normal distribution. In the fractal family of… … Financial and business terms
curve — 1. A nonangular continuous bend or line. 2. A chart or graphic representation, by means of a continuous line connecting individual observations, of the course of a physiologic activity, of the number of cases of a disease in a given period, or of … Medical dictionary
normal distribution — noun Date: 1897 a probability density function that approximates the distribution of many random variables (as the proportion of outcomes of a particular sort in a large number of independent repetitions of an experiment in which the… … New Collegiate Dictionary
Kernel density estimation — of 100 normally distributed random numbers using different smoothing bandwidths. In statistics, kernel density estimation is a non parametric way of estimating the probability density function of a random variable. Kernel density estimation is a… … Wikipedia
Hubbert curve — The Hubbert curve projects the rate of oil production over time, and is the main component of Hubbert peak theory. It was first proposed by geophysicist M. King Hubbert in the mid 1950s during his tenure at the Shell Oil Company. [cite journal |… … Wikipedia
Grading on a curve — In education, grading on a curve (also known as curved grading or simply curving) is a statistical method of assigning grades designed to yield a pre determined distribution of grades among the students in a class. The term curve refers to the… … Wikipedia